October 2013
Intermediate to advanced
192 pages
8h 30m
English
Content preview from Electric Wiring, 3rd Edition
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32 Domestic installation practice
the ingress of dirt or moisture or accidental touching of live parts; therefore,
grommets should be tight fitting and any unused conduit entries should be
blanked off.
There must be a good mechanical and electrical connection between
metallic conduit and metalclad fuseboards. This is usually achieved by
screwing the end of the conduit and fitting a brass bush and locknut as shown
in Fig. 3.2. If there is a break between metal casings of cables and main
switch or distribution chambers, bonding clips or clamps and copper wires
must be used to ensure proper bonding and earthing.
Consumer units should be clearl ...
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